Mathematics – Logic
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...445..591e&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 445, no. 2, p. 591-598
Mathematics
Logic
40
Density Wave Model, Galactic Structure, Mass Distribution, Spiral Galaxies, Symmetry, Corotation, Cosmology, Error Analysis, Gravitational Lenses, Luminosity, Morphology
Scientific paper
Most galaxies with spiral density waves, including those with multiple long arms, have two prominent symmetric arms in their inner regions, inside approximately 0.5 R25. Grand-design galaxies, which have two prominent arms throughout their disks, also have brighter, narrower, and more continuous arms inside this radius. Based on measurements of these morphological features in 173 galaxies, and on our previous studies of optical resonance indicators, we propose that corotation is optically visible in most spiral galaxies and is located near the radius of the endpoints of the highly symmetric part of the spiral arms, approximately midway out in the disk. This places the outer Lindbald resonance at approximately R25, or approximately 4 scale lengths, for most spiral galaxies. In barred galaxies, the two inner symmetric arms end at twice the bar radius, independent of the bar type. If large bars end near corotation, then the ends of the two prominent arms must be beyond corotation in these systems.
Elmegreen Bruce G.
Elmegreen Debra Meloy
No associations
LandOfFree
Inner two-arm symmetry in spiral galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inner two-arm symmetry in spiral galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inner two-arm symmetry in spiral galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1202109